JTable cellRenderer不会改变desingated单元

Question

这是我的项目的代码部分。 我试图改变desingated细胞的颜色。但是当我尝试它时，所有单元格的颜色都在变化。这是为什么 ？ 谢谢。

private class cellRenderer extends DefaultTableCellRenderer { 

    @Override 
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { 

     Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column); 
     if(row==column){ 
      cell.setBackground(Color.yellow); 
     }  
     return cell; 
    } 
} 

Answer 1

我认为你需要恢复原来的颜色。

private class cellRenderer extends DefaultTableCellRenderer { 
    Color originalColor = null; 

    @Override 
    public Component getTableCellRendererComponent(JTable table, Object value, boolean isSelected, boolean hasFocus, int row, int column) { 

     Component cell = super.getTableCellRendererComponent(table, value, isSelected, hasFocus, row, column); 


     if (originalColor == null) { 
      originalColor = cell.getBackground(); 
     } 

     if(row==column){ 
      cell.setBackground(Color.yellow); 
     } else { 
      cell.setBackground(originalColor); 
     } 

     return cell; 
    } 
}